https://forums.autodesk.com/t5/fusion-design-validate-document/bspp-thread-cam-parameter/m-p/11017889#M61398 <P>Hello Forum,</P><P>&nbsp;</P><P>althoguh I am success to metric threadmilling with the support NYC CNC's youtube video,</P><P>I never success to BSPP 1/2" or above female threadmilling yet since the male parts cannot screw into it.</P><P>would someone share what is the correct value for "Pitch Diameter Offeset" for BSPP thread (55 degree) ?</P><P>&nbsp;</P> Mon, 21 Mar 2022 03:15:18 GMT gmddufpark 2022-03-21T03:15:18Z https://forums.autodesk.com/t5/fusion-design-validate-document/bspp-thread-cam-parameter/m-p/11017889#M61398 <P>Hello Forum,</P><P>&nbsp;</P><P>althoguh I am success to metric threadmilling with the support NYC CNC's youtube video,</P><P>I never success to BSPP 1/2" or above female threadmilling yet since the male parts cannot screw into it.</P><P>would someone share what is the correct value for "Pitch Diameter Offeset" for BSPP thread (55 degree) ?</P><P>&nbsp;</P> Mon, 21 Mar 2022 03:15:18 GMT https://forums.autodesk.com/t5/fusion-design-validate-document/bspp-thread-cam-parameter/m-p/11017889#M61398 gmddufpark 2022-03-21T03:15:18Z https://forums.autodesk.com/t5/fusion-design-validate-document/bspp-thread-cam-parameter/m-p/11020019#M61399 <P>I found the answer for myself, BSPP the cut off height&nbsp; H/6.</P><P>So, the calculation would be "major - minor + cutoff".</P><P>however, Fusion hold command looks not perfectly match with BSP spec drill size recommendation. it always littble lower than the BSP drill size recommendation.</P> Mon, 21 Mar 2022 23:26:19 GMT https://forums.autodesk.com/t5/fusion-design-validate-document/bspp-thread-cam-parameter/m-p/11020019#M61399 gmddufpark 2022-03-21T23:26:19Z